After completing the Lost Prophecies mission and going to the Urshilaku Camp to find out what to do next, everybody service refusals me - they say I bear the "Mark of Zenithar" and must fulfill my "Oath". I don't remember anything about swearing an oath to Zenithar.
Also my Block skill has been reduced to 0, even though I don't have any negative effects & all my attributes are not reduced.
Btw, mods = Morrowind Overhaul, all the LGNPCs, LCV, Tamriel Rebuild (3.1).